Home Postcode finder SA Haines Haines postcode SA Haines is a locality in South Australia covered by postcode 5223. Postcode 5223 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Haines business listing Be the first listing in Haines Common questionsWhat is the postcode for Haines?Haines, SA has the postcode 5223.What state is Haines in?Haines is in South Australia (SA).Does postcode 5223 cover more than one suburb?Yes. Postcode 5223 covers 30 localities, so the postcode alone does not identify Haines. Browse other postcodes in South Australia, or widen the search to every Australian postcode.